Apparatus for injection molding
US8062016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2006 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Aug 16, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/14934
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molded article with which a sheet-like material, such as a decorative sheet, is integrated is manufactured without causing damage to the sheet-like material. A molten resin injected into a mold cavity, passes smoothly a peripheral edge of the mold cavity, and flows into a groove portion without accumulating in the vicinity of the peripheral edge. When cooling the molten resin, the temperature of the molten resin in the groove decreases more quickly than the temperature of the molten resin in the mold cavity, because the volume of the groove portion is smaller. As a result, the viscosity of the molten resin in the groove portion and in the vicinity of the peripheral edge of the mold cavity is increased rapidly, preventing a further volume of the molten resin from flowing into the groove portion. The sheet-like material in the vicinity of the peripheral edge is covered by the resinous material of diminished fluidity and protected against exposure to heat and/or pressure of the molten resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.